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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.view;
import android.os.Parcel;
import android.os.Parcelable;
/**
* Common base class for input events.
*/
public abstract class InputEvent implements Parcelable {
/** @hide */
protected static final int PARCEL_TOKEN_MOTION_EVENT = 1;
/** @hide */
protected static final int PARCEL_TOKEN_KEY_EVENT = 2;
/*package*/ InputEvent() {
}
/**
* Gets the id for the device that this event came from. An id of
* zero indicates that the event didn't come from a physical device
* and maps to the default keymap. The other numbers are arbitrary and
* you shouldn't depend on the values.
*
* @return The device id.
* @see InputDevice#getDevice
*/
public abstract int getDeviceId();
/**
* Gets the device that this event came from.
*
* @return The device, or null if unknown.
*/
public final InputDevice getDevice() {
return InputDevice.getDevice(getDeviceId());
}
/**
* Gets the source of the event.
*
* @return The event source or {@link InputDevice#SOURCE_UNKNOWN} if unknown.
* @see InputDevice#getSourceInfo
*/
public abstract int getSource();
/**
* Modifies the source of the event.
*
* @param source The new source.
* @hide
*/
public abstract void setSource(int source);
/**
* Copies the event.
*
* @return A deep copy of the event.
* @hide
*/
public abstract InputEvent copy();
/**
* Recycles the event.
* This method should only be used by the system since applications do not
* expect {@link KeyEvent} objects to be recycled, although {@link MotionEvent}
* objects are fine. See {@link KeyEvent#recycle()} for details.
* @hide
*/
public abstract void recycle();
/**
* Gets a private flag that indicates when the system has detected that this input event
* may be inconsistent with respect to the sequence of previously delivered input events,
* such as when a key up event is sent but the key was not down or when a pointer
* move event is sent but the pointer is not down.
*
* @return True if this event is tainted.
* @hide
*/
public abstract boolean isTainted();
/**
* Sets a private flag that indicates when the system has detected that this input event
* may be inconsistent with respect to the sequence of previously delivered input events,
* such as when a key up event is sent but the key was not down or when a pointer
* move event is sent but the pointer is not down.
*
* @param tainted True if this event is tainted.
* @hide
*/
public abstract void setTainted(boolean tainted);
/**
* Returns the time (in ns) when this specific event was generated.
* The value is in nanosecond precision but it may not have nanosecond accuracy.
* @hide
*/
public abstract long getEventTimeNano();
public int describeContents() {
return 0;
}
public static final Parcelable.Creator<InputEvent> CREATOR
= new Parcelable.Creator<InputEvent>() {
public InputEvent createFromParcel(Parcel in) {
int token = in.readInt();
if (token == PARCEL_TOKEN_KEY_EVENT) {
return KeyEvent.createFromParcelBody(in);
} else if (token == PARCEL_TOKEN_MOTION_EVENT) {
return MotionEvent.createFromParcelBody(in);
} else {
throw new IllegalStateException("Unexpected input event type token in parcel.");
}
}
public InputEvent[] newArray(int size) {
return new InputEvent[size];
}
};
}
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